efficient_sm2/
rand.rs

1// Copyright 2020 Yao Pengfei.
2//
3// Permission to use, copy, modify, and/or distribute this software for any
4// purpose with or without fee is hereby granted, provided that the above
5// copyright notice and this permission notice appear in all copies.
6//
7// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
8// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
9// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
10// SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
11// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
12// OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
13// CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
14
15use rand::rngs::ThreadRng;
16use rand::Rng;
17
18/// A secure random number generator.
19pub trait SecureRandom {
20    /// Fills `dest` with random bytes.
21    fn fill(&mut self, dest: &mut [u8]);
22}
23
24pub struct DefaultRand(pub ThreadRng);
25
26impl SecureRandom for DefaultRand {
27    fn fill(&mut self, dest: &mut [u8]) {
28        self.0.fill(dest)
29    }
30}